Non-Malleable Time-Lock Puzzles and Applications
Non-Malleable Time-Lock Puzzles and Applications
复制标题
不可延展的时间锁谜题和应用
DOI:
10.1007/978-3-030-90456-2_15
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Naomi Sirkin
中科院分区:
文献类型:
--
作者:
Cody Freitag;Ilan Komargodski;Rafael Pass;Naomi Sirkin
Time-lock puzzles are a mechanism for sending messages “to the future”, by allowing a sender to quickly generate a puzzle with an underlying message that remains hidden until a receiver spends a moderately large amount of time solving it. We introduce and construct a variant of a time-lock puzzle which isnon-malleable, which roughly guarantees that it is impossible to “maul” a puzzle into one for a related message without solving it.Using non-malleable time-lock puzzles, we achieve the following applications:The first fair non-interactive multi-party protocols for coin flipping and auctions in the plain model without setup.Practically efficient fair multi-party protocols for coin flipping and auctions proven secure in the (auxiliary-input) random oracle model.As a key step towards proving the security of our protocols, we introduce the notion of functional non-malleability, which protects against tampering attacks that affect a specific function of the related messages. To support an unbounded number of participants in our protocols, our time-lock puzzles satisfy functional non-malleability in the fully concurrent setting. We additionally show that standard (non-functional) non-malleability is impossible to achieve in the concurrent setting (even in the random oracle model).
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DOI:
10.1007/978-3-030-26954-8_18
发表时间:
2019
期刊:
Electron. Colloquium Comput. Complex.
影响因子:
--
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DOI:
10.1515/jmc-2013-5011
发表时间:
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期刊:
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影响因子:
--
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通讯作者:
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影响因子:
--
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DOI:
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发表时间:
2021
期刊:
IEEE/ACM Transactions on Networking
影响因子:
--
作者:
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Sabine Oechsner
DOI:
--
发表时间:
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期刊:
Theory of Cryptography Conference
影响因子:
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